Did a factory reset on the Nokia router.. Then changed the 2.4 & 5ghz
WiFi to different names.. Configured all devices onto the same (2.4ghz)
network. Then factory reset the chromecast.. Seems to work now
I'd be interested to know the solution as have exactly the same issue.
Chromecast devices all factory reset and connected to the new WiFi. But
all showing as offline in the app.Network tracing tool show then as
active..Interestingly, my TV also can't...